Improvement in mechanism for driving sewing-machines



ing the brake.

U E-D STATES ELISHAI SHIVER,

PATENT. Orrrcn.

OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO J. HVMOBLAIR,

or SAME PLACE.

IMPROVEMENT IN; MECHANISMLFQR omvinav SEWINGE'MACHINES.

Specification formingpart of Letters Patent No. 100,935, dated Mar'cli'lS, 1870.

do hereby declare that the following is a full,

clear, and exact description thereof, reference being had to the annexed drawings,.making part of this specification, in which- Figurel is a side elevation of my improved motor, showing one of the driving-sprin gs and the friction-brake for checking. the movement of the parts. Fig. 2 is a-plan or top. view, showing the cases which inclose the springs, the'fly-wheel, and the gearing which com1nu= nica-tes the motion to the sewing-machine. Fig.3is a vertical sectional elevation, showing the train of gear-wheels,the device for preventihgthe breaking ofthe springs by winding up too far, and one method of apply- Fig. 4 is a detached view of the collar which is'nsed upon the windingshaft toenabl'e one spring-to be. thrown out of gear whenever it is desirable todo so.

Gorre'spondingletters refor to corresponding parts in the several figures.

This invention relates to motors for driving sewing-machines; and it consists in the construction, combination, and arrangement of the partsof which it is composed, as will be more fullydescribedhereinafter.

Motors for the purpose to which this is to be applied have heretoforebeen constructed c011- sisting of springs for giving motion to the parts, and a train of gear-wheels for communicating such motion or power to the sewingmachine, but such devices have never, to my knowledge, been supplied with the means for preventing the springs from being broken by being wound up too far; neither have they been supplied with the means for using one or both springs at pleasure, and for regulating the expenditure of the power, as in this case.

The object of the present in ventionis to provide the means of accomplishing the aboveindicated results.

. To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A, in the drawings, refers toa table or frame, to the under side of which the machinery is v to beattached. A A representthe' frame or the motor,it being composed'of two plates of metal, in which bearings areforrned for the journals of the shafts which carry the gearin g, said plates heingheld in position by means of bolts or rods which pass through them,and

I have nuts-upon their o'uterends, which'prc'ss such plates against shoulders upon said rods. B refers to a shaft which extend-s through both of the sideplates of frame Ahand projects vbeyond each for adis-tance sufficient to admit of there being, placed upon its outer squared ends a key for winding up theisprings. C refers-to a pinion gear-wheel, which is placed upon the shaft B at a point about midway be tween the sides of the frame, and so arranged as to-mesh intothe wheel 0 upon the shaft to which the springs are attached. 0 refers to a spur-wheel, which is placed upon the spring-shaft, and which receives its motion in the winding up of the machine from the wheel U, but which, in expendingthe force of the springs, imparts its motion to the train of wheelssoon to be described. D Dieter to The means of effecting the connection referred to is shown at B, Fig. 4, and consists in a collar placed upon the shaft G ,.and having a pin projectingtherefrom for the'purpose of entering a hole formed in the inner end of the spring.

to is placed upon the pin on collar B, when by turning shaft 0 both springs are wound up, and the forces of both are expended in turning the shaft and the parts connected therewith; but when only one spring is required, the end of this one is detached from the pin, and the otheris used in the usual manner.

E refers to a cam which is attached to the shaft which carries the springs, and is so arranged as to extend into slots formed in the When it is desirable to use both a of the springs, the end of the one last referred I volve upoua stud secured inthe'fraine A, as

shown in Fig. 2. i 1 This last-named wheel consists of a disk of metal, which is-to have two ormore slots,

ibrmcd .as shown in Fig.3, the objct of which is to permit the cam to enter such slots in the winding up of the; machine, the number of turns which theshaft is permitted to. make being regulated by the'number"ofslots'ilr said wheel, so that when the spring has been wound up as far asit is safe to wind t, the

cam in its revolutionsshalt-come in contact with the periphery of the wheel, and thuspre. ventthe further turning of shaftjtl and, consequently, the further; winding of the spring. This disk at 'fheelinay-be held in'its position longi tud inally', with reference'to the cam, by means of a spring placed between it'and the in icr surfacejof frame A. v

:F, F}, F2113; Ffj Fiend F refentoa series ot' ,gear -wheelsgwhich are mouhtedupon suit-' biej shaftswhiclrhave th'eir hearings in the sideslrt Af 'o'tlf't'he fram such wheels tran-s-- *mitting' thegpower o-ifltlf v I H upon whichj the" pnlleyskK'Ki and the regu .1 lating laii are"placed. The numberand rela- .sti

" fsuchgasto give the required motion to the diameter 0f the'wlie'els alluded-to'may be 'v-liich" ransmit the power to-the ma- G refers ma; fly

or balance wheel, which is 'ltobej;placed'upon the same shaft which-car ries' tl-iiepulleys'K K, but outside'of frame A,

so er'end being supported by'a yoke sen'i dto such'frame. U

'Itw'ill-beseen that owing to the arrangement of gearing this wheel. will necessarily run at a high rate of speed, and that thus'it will more fully accomplishits object, which is tos'tea'dy the movements of the machine.

H refers to a fly or fznn'Which is placed upon the same shaft-as is the pinion-wheel F it beinglocated upon the outside of the frame A,

and, like thebalance-wheel G, having a high velocity! Thisfan or flyis so arranged that it may be turned upon its ownaxis, and so i that it revolves with the shaft to which it is attached. Irefers to the handle of a brake,

i f-which 1 acts upon the balance-wheel G, it benglocatedupon the upper side of the table A,; which is provided with a socket for the lower end'of' said handle to enter, so that,

' wh'en it is desirable to have the brake act upwon thewh'eel, it is permitted to enter such prii'igs to the shafts the brake from contact with the wheel, the .handle, is raised 'out of its socket or recess, and is'allowed to rest upon the upper surface .,of the table, by which .means the rod which connects'it with the brake -I lifts such brake resistance to the movementsthcreof, but it may again be applied by simply moving the handleuntil-it will enter the recess," when the spring or brake will fall and again act upon the wheel. 1 refers to a collar which is secured to the fr'amc A by a screw, as shown in Fig. .3, it being made togra-sp and hold the wheel Gris secured. This .rod or strap is to be of wood ormetahitsoffice being to serve may be used'inconjunction with the one already described, or which may be usedto constrap I,andeitherpressing down, so as. to

i 1, The arrangement of the two springsupon the same shaft, one being attachable and detachable at pleasurc,'and the other perma claim, anddesir'e to secure by Letters Patent,

two subscribing witnesses.

Witnesses:

A. RUPPERT, B. EDW. J. mm.

.sockehbut when it becomes-necessary to raise from 'the wheel, audit no longer offers any" two arms of a rod or strap, 1 which passes around the shaft upon which the balanceii as an additional'brake to the machine, which trol the moyenients of the machine whenithe other is not in operation, by placing the foot in the loop at the lower end of the rod or bring strap 1 upon the shaft, orbyraisingmitup so as to-bring theopposite side of-the strap.

in contact with the under side of the shaft. 0 a Havingthus describedmy invention, what I nently attached thereto, substantially as and 4. The combination of the collar 1 rod or In testimony whereof I have signed my name to this specification in the presence of E. SHIVER. i 

